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Property, plant and equipment - Property, plant and equipment. Accumulated Depreciation (Details) - ARS ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | $ 23,165 | $ 17,963 |
Depreciation | (5,039) | (4,358) | $ (3,046)
Property, plant and equipment at end of period | 28,538 | 23,165 | 17,963
Accumulated depreciation and amortization | PP&E without materials |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | (39,271) | (34,583) |
Increase for Tuves Paraguay acquisition | (83) |  |
Depreciation | (5,039) | (4,358) |
Currency translation adjustments | (1,327) | (1,033) |
Transfers and reclassifications |  | 703 |
Decreases | 545 |  |
Property, plant and equipment at end of period | (45,175) | (39,271) | (34,583)
Accumulated depreciation and amortization | Building |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | (1,171) | (1,134) |
Depreciation | (52) | (41) |
Currency translation adjustments | 13 | 4 |
Property, plant and equipment at end of period | (1,210) | (1,171) | (1,134)
Accumulated depreciation and amortization | Tower and pole |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | (712) | (596) |
Depreciation | (97) | (77) |
Currency translation adjustments | (52) | (39) |
Property, plant and equipment at end of period | (861) | (712) | (596)
Accumulated depreciation and amortization | Transmission equipment |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | (5,793) | (5,265) |
Depreciation | (633) | (476) |
Currency translation adjustments | (113) | (87) |
Transfers and reclassifications |  | 35 |
Decreases | (57) |  |
Property, plant and equipment at end of period | (6,596) | (5,793) | (5,265)
Accumulated depreciation and amortization | Mobile network access |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | (3,910) | (3,210) |
Depreciation | (1,146) | (877) |
Currency translation adjustments | (226) | (147) |
Transfers and reclassifications |  | 324 |
Decreases | 257 |  |
Property, plant and equipment at end of period | (5,025) | (3,910) | (3,210)
Accumulated depreciation and amortization | External wiring |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | (6,984) | (6,597) |
Depreciation | (593) | (472) |
Transfers and reclassifications |  | 85 |
Property, plant and equipment at end of period | (7,577) | (6,984) | (6,597)
Accumulated depreciation and amortization | Switching equipment |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | (7,342) | (6,327) |
Depreciation | (703) | (856) |
Currency translation adjustments | (282) | (211) |
Transfers and reclassifications |  | 52 |
Decreases | 118 |  |
Property, plant and equipment at end of period | (8,209) | (7,342) | (6,327)
Accumulated depreciation and amortization | Power equipment |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | (1,050) | (921) |
Depreciation | (119) | (97) |
Currency translation adjustments | (45) | (34) |
Transfers and reclassifications |  | 2 |
Decreases | 2 |  |
Property, plant and equipment at end of period | (1,212) | (1,050) | (921)
Accumulated depreciation and amortization | Computer equipment and systems |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | (9,136) | (7,778) |
Depreciation | (1,112) | (997) |
Currency translation adjustments | (450) | (363) |
Transfers and reclassifications |  | 2 |
Decreases | 34 |  |
Property, plant and equipment at end of period | (10,664) | (9,136) | (7,778)
Accumulated depreciation and amortization | Telephony equipment and instruments |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | (789) | (773) |
Depreciation | (22) | (15) |
Currency translation adjustments | (3) | (2) |
Transfers and reclassifications |  | 1 |
Property, plant and equipment at end of period | (814) | (789) | (773)
Accumulated depreciation and amortization | Handsets lent to customers at no cost |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | (508) | (475) |
Increase for Tuves Paraguay acquisition | (83) |  |
Depreciation | (75) | (50) |
Currency translation adjustments | (98) | (98) |
Transfers and reclassifications |  | 115 |
Decreases | 50 |  |
Property, plant and equipment at end of period | (714) | (508) | (475)
Accumulated depreciation and amortization | Equipment lent to customers at no cost |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | (141) | (101) |
Depreciation | (155) | (116) |
Transfers and reclassifications |  | 76 |
Decreases | 124 |  |
Property, plant and equipment at end of period | (172) | (141) | (101)
Accumulated depreciation and amortization | Vehicles |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | (223) | (183) |
Depreciation | (57) | (47) |
Currency translation adjustments | (4) | (4) |
Transfers and reclassifications |  | 11 |
Decreases | 17 |  |
Property, plant and equipment at end of period | (267) | (223) | (183)
Accumulated depreciation and amortization | Furniture |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | (146) | (128) |
Depreciation | (15) | (11) |
Currency translation adjustments | (9) | (7) |
Property, plant and equipment at end of period | (170) | (146) | (128)
Accumulated depreciation and amortization | Installations |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | (719) | (603) |
Depreciation | (137) | (102) |
Currency translation adjustments | (16) | (14) |
Property, plant and equipment at end of period | (872) | (719) | (603)
Accumulated depreciation and amortization | Improvements in third parties buildings |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | (529) | (403) |
Depreciation | (89) | (98) |
Currency translation adjustments | (42) | (28) |
Property, plant and equipment at end of period | (660) | (529) | (403)
Accumulated depreciation and amortization | Special projects |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | (47) | (34) |
Depreciation | (17) | (13) |
Property, plant and equipment at end of period | (64) | (47) | (34)
Accumulated depreciation and amortization | Asset retirement obligations |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | (71) | (55) |
Depreciation | (17) | (13) |
Currency translation adjustments |  | (3) |
Property, plant and equipment at end of period | (88) | (71) | $ (55)
Gross Carrying Amount, Net of Accumulated Depreciation |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | 23,165 |  |
Property, plant and equipment at end of period | 28,538 | 23,165 |
Gross Carrying Amount, Net of Accumulated Depreciation | PP&E without materials |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | 21,886 |  |
Property, plant and equipment at end of period | 26,963 | 21,886 |
Gross Carrying Amount, Net of Accumulated Depreciation | Land |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | 151 |  |
Property, plant and equipment at end of period | 153 | 151 |
Gross Carrying Amount, Net of Accumulated Depreciation | Building |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | 706 |  |
Property, plant and equipment at end of period | 782 | 706 |
Gross Carrying Amount, Net of Accumulated Depreciation | Tower and pole |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | 985 |  |
Property, plant and equipment at end of period | 1,127 | 985 |
Gross Carrying Amount, Net of Accumulated Depreciation | Transmission equipment |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | 2,217 |  |
Property, plant and equipment at end of period | 2,912 | 2,217 |
Gross Carrying Amount, Net of Accumulated Depreciation | Mobile network access |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | 4,533 |  |
Property, plant and equipment at end of period | 5,378 | 4,533 |
Gross Carrying Amount, Net of Accumulated Depreciation | External wiring |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | 4,545 |  |
Property, plant and equipment at end of period | 5,878 | 4,545 |
Gross Carrying Amount, Net of Accumulated Depreciation | Switching equipment |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | 1,574 |  |
Property, plant and equipment at end of period | 1,357 | 1,574 |
Gross Carrying Amount, Net of Accumulated Depreciation | Power equipment |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | 677 |  |
Property, plant and equipment at end of period | 874 | 677 |
Gross Carrying Amount, Net of Accumulated Depreciation | Computer equipment and systems |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | 2,265 |  |
Property, plant and equipment at end of period | 2,586 | 2,265 |
Gross Carrying Amount, Net of Accumulated Depreciation | Telephony equipment and instruments |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | 56 |  |
Property, plant and equipment at end of period | 89 | 56 |
Gross Carrying Amount, Net of Accumulated Depreciation | Handsets lent to customers at no cost |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | 35 |  |
Property, plant and equipment at end of period | 103 | 35 |
Gross Carrying Amount, Net of Accumulated Depreciation | Equipment lent to customers at no cost |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | 126 |  |
Property, plant and equipment at end of period | 203 | 126 |
Gross Carrying Amount, Net of Accumulated Depreciation | Vehicles |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | 206 |  |
Property, plant and equipment at end of period | 278 | 206 |
Gross Carrying Amount, Net of Accumulated Depreciation | Furniture |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | 56 |  |
Property, plant and equipment at end of period | 64 | 56 |
Gross Carrying Amount, Net of Accumulated Depreciation | Installations |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | 453 |  |
Property, plant and equipment at end of period | 641 | 453 |
Gross Carrying Amount, Net of Accumulated Depreciation | Improvements in third parties buildings |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | 226 |  |
Property, plant and equipment at end of period | 207 | 226 |
Gross Carrying Amount, Net of Accumulated Depreciation | Special projects |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | 42 |  |
Property, plant and equipment at end of period | 57 | 42 |
Gross Carrying Amount, Net of Accumulated Depreciation | Construction in progress |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | 2,915 |  |
Property, plant and equipment at end of period | 4,138 | 2,915 |
Gross Carrying Amount, Net of Accumulated Depreciation | Asset retirement obligations |  |  |
Reconciliation of changes in property, plant and equipment |  |  |
Property, plant and equipment at beginning of period | 118 |  |
Property, plant and equipment at end of period | $ 136 | $ 118 |

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- Definition The increase in property, plant and equipment resulting from acquisitions through business combinations. [Refer: Business combinations [member]; Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2017-01-01 -Paragraph 73 -Subparagraph e -Clause iii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=16&date=2017-03-01&anchor=para_73_e_iii&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of depreciation of property, plant and equipment. [Refer: Depreciation and amortisation expense; Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2017-01-01 -Paragraph 73 -Subparagraph e -Clause vii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=16&date=2017-03-01&anchor=para_73_e_vii&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2017-01-01 -Paragraph 75 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=16&date=2017-03-01&anchor=para_75_a&doctype=Standard -URIDate 2017-03-09 + Details
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